NEW
Font size
WorksheetsF4 : DYNAMIC ECOSYSTEM
Total questions: 20
Worksheet time: 30mins
The biotic factor and abiotic factor of a pond system is ___________ and ____________ respectively.
hydrilla; fish
temperature; pH
pH; hydrilla
fish; temperature
Which of the following parameter is not an abiotic component of an ecosystem?
pH
Humidity
Temperature
Decomposer
Which of following pairs is an example of commensalism relationship?
Lice and dog
Remora and shark
Lichens (algae and fungus)
Protozoa and termites
____________ consists of living and non-living things interact with each other.
Ecosystem
Community
Population
Niche
Diagram above shows a food web.
Which organisms are in the second trophic level?
Bird, tadpole
Snail, fish
Bird, fish, small animals
Snail, tadpole, small animals
Competition is an interaction between individuals to obtain same resources. Which choice shows intraspecific competition?
Lions and hyenas – food
Paramecium aurelia and Paramecium caudatum – space
Young Bryophyllum sp. plants – light
Dogs and cats - space
In an abandoned pond, pioneer species begins to grow and carry out photosynthesis. How pioneer species can begin to survive in such neglected pond?
They can decompose faster
They can absorb more oxygen
They are highly adaptive to dry or nutrient-poor environment
They grow very fast
Based on diagram above, why does such method of reproduction enable mangrove species to overcome unsuitable ground condition?
The radical seedlings can float and be carried away by water.
The radical seedlings can absorb moisture in the air.
The radical seedlings can drop into the ground and hide themselves.
The shape of radicle looks like a snake can scare off some animals.
The following information is a sampling technique to estimate the population size of garden snails in a habitat.
P – Capture at random a number of garden snails and record the number which are marked
Q – Release the garden snails in the same habitat
R – Capture a large number of garden snails and mark each shell
S – Calculate the population of the garden snails
Which sequence is correct?
R -- Q -- P -- S
P -- R -- Q -- S
R -- S -- Q -- P
P -- S -- R -- Q
Table above shows the results of a study on the population of garden snails in a garden.
The estimated population size of the garden snail is:
200
250
300
350
Diagram above shows the process carried out by a farmer to make compost. Which organism is involved in this process?
Algae
Virus
Bacteria
Protozoa
Viruses are the smallest microorganisms visible on earth. Which of the following is true about viruses?
It can be seen under light microscope.
It is a still living cell, though it cannot carry out living processes outside a host.
It is made up of DNA or RNA surrounded by a protein coat.
It cannot reproduce.
Which one is algae?
A symbiotic relationship that benefits both species is referred to as commensalism.
True
False
What is the difference between a community and an ecosystem?
An ecosystem consists of living and nonliving things in an area. A community is all the members of one species in the area.
An ecosystem consists of living and nonliving things in an area. A community is all the populations in the area.
An ecosystem consists of nonliving things in an area. A community is all the living things in the area.
An ecosystem consists of all the populations in an area. A community is all the nonliving things in the area.
In a predator-prey relationship, _____.
the predator hunts the prey for food
the prey hunts the predator for food
the prey keeps the predator population from growing too large
the prey are producers
Samantha plants some flowers in a flower bed and then ignores them. Soon weeds grow and the flowers die. The weeds had been able to get enough resources to survive, while the flowers had not. This is an example of _____.
competition
population size
habitat
community
Barnacles are animals that cannot move. In order to get food, they attach to whales and catch any floating plankton in the water. The whale is neither helped nor harmed in the interaction. What type of symbiosis is this?
Mutualism
Commensalism
Parasitism
Amensalism
In the sea, little fish called pilot fish swim closely to sharks. The pilot fish clean the sharks, and the sharks provide protection for the pilot fish. What type of symbiosis is this?
Mutualism
Commensalism
Parasitism
Amensalism
In this photo, two lions are fighting for a resource. What type of competition is this?
Interspecific competition
Intraspecific competition
Machismo
Competitive exclusion principle
